package written.test;

import java.util.HashSet;
import java.util.List;
import java.util.Scanner;
import java.util.Set;

/**
 * @Author: Dang Qi
 * @Date: 2021/4/1  19:03
 * @Description:
 */
public class Main6 {
    public static void main(String[] args) {

    }
    public static List<String> f(String s){

        return null;
    }
}
